“Mean Girls” turns 10 this spring, so naturally, a bubbly red carpet correspondent decided to ask grown-up Regina George what her favorite quotes from the 2004 teen comedy were, and the former mean girl had trouble coming up with them.

“Oh, um,” Rachel McAdams said when put on the spot at the Sundance Film Festival. “Oh my God. I guess, uh…”

Either McAdams hasn’t watched the movie in a while, or her enthusiasm has diminished for it over the last 10 years, during which she has probably been asked the exact same question 10,000 times.